atrazine - Weed management is a central production issue...

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Weed management is a central production issue for nearly all crops such as corn
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Weeds are strong competitors with many crop plants, especially early in plant development
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Some weeds such as Johnsongrass, considered one of the worlds worst weed pests, is competitive to crops such as cotton and corn throughout the whole crop cycle
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Atrazine
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80 million pounds of Atrazine is applied yearly for broadleaf weed control
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Where? Where?
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Other uses: Conifer reforestation Rights of way (roadsides) Rangeland
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Most commonly used as pre-emergence herbicide in corn
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Atrazine derivatives are commonly used in orchard and grape crops in California
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Herbicide strip
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Terraces without outlets Retains runoff water High High Water and sediment control basins Holds runoff water Medium-High High Reduced tillage (30% residue cover)* Retains runoff water Medium-High High No-till Improves infiltration Medium-High High Ridge-till Retains runoff water Medium-High High Reuse pits Retains irrigation runoff Medium Medium Contour farming Retains sediment and water Low-Medium Medium Strip cropping Retains sediment and water Low-Medium Medium Grass filter strips Slows runoff and increases infiltration Low-Medium Medium Terraces with outlets Slows runoff water Low Medium Grass waterways Slows runoff water
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This note was uploaded on 01/19/2011 for the course ESPM 192 taught by Professor Lindow during the Fall '10 term at University of California, Berkeley.

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atrazine - Weed management is a central production issue...

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